Machine for grinding rollers.



0. A. SCHMIDT.

MACHINE FOR GRINDING ROLLERS. APPLIOATION FILED D320. 27, 1910.

Patented Sept. 5, 1911.

2 SHEETS-SHEET L 1 IXXXXXXXXXILXXXIXXW XIXIIJUIXXXX Y XXX! \NVENTOR.

WITNESSES.

0. A. SCHMIDT. MACHINE FOR GRINDING ROLLEBS. APPLICATION FILED DEC. 27,1910.

1,002,765. 1 Patented Sept. 5,1911.

2 BHEETG-SHEET 2.

Fig.5. 1

HHm58 W! NESSES. INVEN TOR.

AES PATENT FFICE,

OTEG AL'WIN S-CHIEIDT, OF CHELMSFOBD, ENGLAND, ASSIGNOR TO THE HGFFMANNMANUFACTURING COMPANY LIMITED, OF LONDON, ENGLAND.

MACHINE FOB GRINDING ROLLERS.

1l,!l@23,td5. p fi i n of Letters Patent Patented Sept, 5, 1911Application filed December 27, 1am. SerialNo. 599,373.

To all whom it away concern: per to the entrance end of the groove or Beit known that I, Oa ro Am /1N SCHMIDT, grooves to which they are to bedirected, or a subject of the German Emperor, and a the rollers could bepropelled by a driven resident of Cholmstord, in the county of disk ormember forming a support and a 5 Essex, England, have invented a certainnew part of the guide as we have previously proso and useful improvementin Machines for posed. I Grinding Rollers, of which the following is Onemannerof carrying a part of the insoc .ir'ication. vention into effectis to place a driven This invention relates to improvements in groovedwheel or wheels at one or both ends machines for grinding rollersand inpart to of the holder groove or grooves, the wheel such that describedin the specification to or wheels being suitably cased or covered fornwlication ior Letters Patent filed i-th a part of the way around,toform an inclosed 1910, under Serial No. 536259, in channel in which therollers may be held in the rollers have a traveling rolling the sameposition-in which they are in the 15 ment in a guiding device which comholder groove or grooves, the wheels where I: as a part of it a groovein a straight two are employed being arranged at either ioioer guidingdevice the exposed cylinend of the holder groove or grooves and dricalsur es of such rollers being While with the hopper between, andpreferably in' such groove acted upon by a grinding or elevated abovesame, so that on leaving 0 disk with which such groove prefl a point onone wheel the rollers fall into the eraby forms the chord of an arc.hopper and in the case of the other wheel The object of the presentinvention is to where employed the accumulation of rollers improve theconstruction and to render the gradually forces them into the grip ofsame machine iore eiiicient. p by which they are passed to the entranceend 25 Accord ng to the invention the rollers of the groove or grooves.To attain'this end moving successively through a groove or the hopper ispractically of the same width grooves of such a guiding device in agri'ndas the groove or grooves and is preferably ing machine mixed in ahopper or inclined from one wheel to the other if the device, preferablywhile they are passed or second one is employed or is inclined toward 30carried by a transferring device so that their One end so as to assistthe rollers in moving I relativclpositions to one another are changed(if they are not driven through the hopper) (as is done in certain ballgrinding maand it is also preferably .provided with a chine), afh rwhichthey are again passed or ridge or weir rising from the bottom of samecarried back to the same groove or grooves at some suitable point sothat a pocket is 5 of the guiding device or to different ones as formed,at least on one side, to hold an acdesired, or they may be passed orcarried cumulation of rollers. and to afford them the from the exit endof one straight groove or opportunity of mixing with those coming chordto the entrance end of the next (which from the delivery wheel, whilethe ridge or may be another grinding device or machine Weir checks theirmovement somewhat and 40 if desired; and so on by a suitable channelrelieves the wheel at the exit end if emor channels. ployed, of a partof their weight. Further according to the invention th The gripping ofthe rollers by the wheel rollers are positively propelled in the transorwheels can be done in various ways as, ferring device, and they are alsopresented for nstance; y 3 fie b e. S band which is adjusted, for thepurpose of preis desired to grip the rollers.

scnting them evenly to the face of the grind In the construction abovedescribed he ing machine. u axis of the grinding disk or member is pref-It is preferred, though it is\\not essential, erably vertical so thatthe holder is horiwhere the hopper is employed, to positively Zontal,but the reverse arrangement may be 5 carry or propel the rollerspreferably after employed, the grinding member or disk havthey leave theexit end' of the groove or ing a horizontaLaxis. In this latter casegrooves until they reach the" hopper (or in the holder *groove o'rgrooves might be in a v addition through the latter) and to subsemore'or less vertical position, the traveling 95 quently carry or propelthem from the hoprolling movement imparted to the rollers to thegrinding member by a guiding device ering that portion of the wheel inwhich it 1 0 by the grinding disk or member driving them upward anddischarging them into the hopper in which they would be mixed anddischarged by gravity to the entrance end of the holder groove orgrooves. If the traveling rolling movement in the holder groove orgrooves were downward some mechanical device as above described would berequired to elevate the rollers to the hopper or in either case agrooved wheel or wheels might be employed to assist the movement of therollers. The. holder may be further, so carried as to be adjustable sothat it can present the desired faces of the roller evenly to thegrinding disk or member. Such adjustment may be obtained in variousways.

Some examples of the above and other features of the invention are shownin the accompanying drawings in which Figure 1 is a front elevationpartly in section of one: lorm'oi: the apparatus in whiclrthe grindingmember or disk has a vertical axis. Fig. 2 is an end elevation of samealso partly in section and with a part removed. Fig. 3 is a diagrammaticelevat-ion showing another form in which the grinding member or disk hasa horizontal axis. Fig. t is a plan of a part of Fig. 3. Fig. 5 is adiagrammatic side elevation showing a further form in which the grinding disk has a horizontal axis, and Fig. 6 is a front elevation of Fig.

In the form shown in Figs. 1 and 2 the shaft or axis 1 of the grindingdisk or member 2 is vertical the latter being in this case mounted abovea single groove or roller holder designated generally by 3 and at eachend of such groove is placed a grooved wheel 4, 5 respectively suitablydriven such as by sprocket wheels 7 and universal shafts 8 (Fig. 2) oneonly of the latter being indicated, the wheels 7 being preferablyconnected by a chain 7 which is in turn suitably driven as by asprocketwheel 7 The grooves in the wheels 4, 5 are covered in for aportion of the way around their cir cumference as shown, the cover ofthe wheel 4 being a curved plate 11 over the groove pivoted at one endto the grooved holder 3 at 9 and at the other end attached to a hopper10 which connects the wheels 4; and 5 above the grinding disk 2. v

The connection of the wheel co'ver ll with the hopper is preferably aspringone such as by the flanges 12, 13, and spring surrounded screwbolt 1s so that an adjustment is provided which will enable the rotatingwheel 4 to grip and propel the rollers.

The flange 13 may form part of a cover for-the hopper either fixed rremovable, or as shown in the drawing it fna be carried only by a shield15 atthe end 0 the hopper,

the main portion ofthe hopper being open.

The cover 16 of the wheel 5 has at one end a flange 17 connected to aflange 18 on the end 0 the hopper by a spring screw bolt 19 and at theother end it has a spindle 22 movable in an eye 20 of a strap 21attached to the holder 3 said spindle carrying a spring 24: and-passingthrough an eye 23 on the holder 3. In-this way the contact of the cover16 over all the rollers can be regulated and an inclosed channel inwhich the rollers are propelled is formed partly around each wheel.There are other ways however, of eiiecting the gripping of the rollersas for instance, by adjusting the wheel itself to exert greater orlesspressure or using other forms of spring covers, or by suitablyforming or covering the surface of same.

The hopper guiding device and grooved holder including the wheelsthroughout are so formed by means of their side plates and bottomplates, that the rollers are a fairly close fit in same and areconsequently maintained at right angles to their line of travel orrolling'movement.

If the wheel 5 is rotated in the direction of the arrow, the rollerswill be driven around one half the circumference of same and dischargedinto the hopper 10 which in the form, shown is inclined toward one endsoasto assist the rollers in moving (it they are not positively driventhrough the hopper). Such hopper is also provided with a ridge or weir25 rising from the bottom of same so that a pocket is formed on one sideto hold an accumulation of rollers and to afford them the opportunity ofmixing with those comin from the delivery side of the wheel, while theridge checks their movement somewhat and relieves the wheel at the exitend if employed of a part of their weight.

The grooved holder is preferably so carried as to be adjustable so thatit can present the cylindrical faces of the rollers evenly to thegrinding disk or member. Such adjustment may be obtained in variousways, for instance, the grooved holder can be carried by a block 27having a curved base which seats in a correspondingly curved recess orseat 28 in the frame, bolts 29, 29 being employed as a means tor'holdingthe block in position and adjusting it laterally by tilting it in itsseat 28.

The groove in the holder may be conveniently formed by clamping platesor bars 30 on each side of a central rib 31 forming part of the blocksuch rib forming the bottom of the groove while the plates or bars formthe sides of the grooves. This is a convenient arrangement asthe platescan be readily removed and refaced when required. v

The construction of grooved holder us hereinbefore described is usefulalso in the case of a grinding disk having a horizontal axis but in thelatter case a different form of hopper is necessary and some examples ofthese are shown in Figs. 3 to 6. In Fig. 3 for example the grinding disk32 is carried by a horizontal shaft 32 the. grooved holder 33 being in avertical position. and counnunicating in this instance with a singlesuitably driven wheel 34 having a cover hinged at 36 and adjustable by sspring controlled screwed rod or bolt 37. The side of the wh cel whichis farthest away from -the disk 32 is fed from an, inclined chute orhopper 38, which may consist of a curved inclined strip of sheet metallocated between two'side plates or walls 39I A part of the strip mayform a receptacle 38 for receiving and mixing the rollers, which may,drop thercon from an upper oppositely inclined chute or hopper 40provided if desired witha ridge 41 to give the rollers a furtheropportunity of? mixing. The rollers are forced uplvardly by the rotationof the wheel 3% and complete a circuit with a break in part of sameabove the receptacle 38 as shown but such break and receptaclemaydispensed with if desired.

'ln'Figs. -5 and 6 a simple hopper is employcd of a type somewhatsimilar to that proposed in the known ball grinding machine'referred to,the grinding disk 41-3 having a horizontal axis 4-3, and there being inthis case two suitably driven wheels 41 45 connectt l by vertical rollerholders formed preferably as a grooved cast structure 4-6 con iprisingat the point Where it faces the disk, 21 back plate 47 and. side plate48 (a portion 01* one only of which is shown in Fig, 5). and at thepoint where it forms acomlnnnication between the opposite sides ofwheels 44, 45 comprising a back plate 49 side plates 50 (a portion ofone only of which shown) and a, front plate or cover 51 whiclris out andflared outwardly at to form a hopper; Each wheel d4; and 45 is providedwith are-over 53, 54: respectively, such covers being adjustable byspring screw belts in the manner previously-described. p

In place of locating the hopper on the side farthest away from thegrinding member, it could be located at a point on the back plate 4;?which would be cut away for hat purpose but in this case the grindingmember would be rotated in the opposite di ection. y

In all cases it is desirable, to obtain the best results, th'oug'h notnecessary, to enrploy an excess number of rollers, that is to partly[ill the hoppers so as to maintain the continuity of the chain ofrollers and con sequently their movement past the face of the grinding:disk through the holder and guiding device.

ln the particular form shown in Fig. while the chain of rollers orcontinuity is not complete the desired pressure to effect or assist thetravel is maintained by the inclination of the lower chute.

Various forms of and locations tor,- the hopper have been described and.illustrated, but it will be appreciated that many others are possible,Further, a singlehopper and, a single groove only have been shown butmultiple hoppers may be employed, or multiple grooves and a singlehopper if the latter provided with guides for maintaining the rollers atright angles to the sides of same and for directing them to therespective grooves.

What is claimed is 1. A machine for grinding rollers comprising incombination. a grinding member,

a guiding device adapted to present the rollers to the face of thegrinding maxnbcr, and

means for mixing the rollers in file order oni while maint :tining themat right angles to their line of travel. I

2. machine for grinding rollers eornprising in combination grindingmember, a guiding device adapted. to present the roll.- ers to the faceof the grinding member, transferring device adapted to hold the rollersat right angles to theirlino ,oftravel, and means located in thetransferring device for mixing the rollers in file order only, whilemaintaining them at right angles to their line of travel.

3. A machine for grinding rollers cornprising in combination, a grindingmember, a guiding device adapted to present the rollers to the face ofthe grinding member, a transferring device and a device for propollingthe rollers located in the transferring device, both transf andpropelling devices adapted to hold the rollers at right angles to theirline of travel.

4. A ma hine for grinding rollers comprising in combination, a grindingmember, aguiding de ice adapted to present the rollers to the face ofthe grinding member, a transferringdevice, a device for n'iircing therollers in file. order while maintaining them at right angles to theirline of travel, such mixing device located in the t 'ansferring device,and means for propelling the rollers also located in the transierringdevice and adaptcd also to maintain the rollers at right angles to theirline of travel.

5. A machine for grinding rollers compi'ising' in combination a grindingmember, guiding device adapted to present the rollcrs to the -face ofthe grinding member, a transferring de ice, a wheel in the transferringdevice, means for driving said wheel, a cover for same and means forassistingthe pressure of the wheel on the rollers between same and thecover.

-6. A machine for grinding rollers, comprising in combination, agrinding member, a guiding device for the rollers, a transfer- &

ring device, a hopper located in the transferring device, and a ridgeformed in a part of said hopper, and rising from the bottom of same forcollecting said rollers.

7. A machine for grinding rollers comprising in combination, a grindingmember, a guiding device adapted to present the rollers to the face ofthe grinding member and means for adjusting such part to present therollers evenly to such face.

8. A machine for grinding rollers com prising in combination, a grindingmember, a guiding device adapted to present the rollers to the face ofthe grinding member, a curved block carrying such guiding deviceadjustable in a corespondingly curved seat guiding device comprising acurved block adjustable in a corespondingly curved seat, a rib carriedby such block, side plates on either side of said rib projecting abovesame, and means for securing the plates to the rib.

10. A machine for grinding rollers comprising in combination a grindingmember, a guiding device adapted to present the rollers to the face ofthe grinding member, a transferring device, a Wheel located in thetransferring device and forming a part of a coverfor said Wheel, meansfor adjusting the pressure between the cover and the Wheel, means forpropelling the Wheel and a hopper located in the transferring device.

.In testimony whereof I have set my hand in the presence of twosubscribing Witnesses.

OTTO A-LWIN SCHMIDT. WVit-nesses WILLIAM HOLMES, ARTHUR Gr. GoBELL.

